Guard for punch presses



E. ISCHINGER GUARD FOR PUNCH PRESSES Filed July 31, 1922 {Sheets-Sheet 1 Jab. '17, 1928. l 1,656,202

INVENTOR Jan. 17, 1928. 1,656,202

E. ISCHING ER siman FOR PUNCH PRESSES Filed July 31, 1922 2 Sheets-Sheet INVENTOR Patented Jan. 17, 1928.

UNITED STATES.

PATENT OFFICE.

, ERIC ISCHINGER, OF EAST ROCHESTER, NEW YORK, ASSIGNOR OF CITE-HALF TO FRANK KEIPER, OF ROCHESTER, NEW YORK.

GUARD roe PUNCH rnnssns.

Application filed July 31,

The object of this invention is to provide an improved type of guard for punch presses in which all of the connecting members of the guard with the punch press as well as the guard member proper are made adjustable so that the guard can be applied to any size and type of punch press. This :uljustment of the parts makes it also possible to increase or decrease the sweep of the guard member and correspondingly increase or decrease the speedwith which this guard member swings past the danger point of the press. i

This and other objects of this invention will be fully illustrated in the drawings; described in the specification and pointed out in the claims at the end thereof.

In the accompanying drawing:

Figure 1 is a perspective View of the guard applied to a punch press.

Figures 2 and 3 are detail perspective views of modified forms of connecting members that may be used on the guard.

In the several figures of the drawing, like reference numerals indicate like parts.

The guard forming the subject matter of my present invention is an improvement over the guard illustrated in my prior application Serial No. 567,149. In this new and improved guard the members thereof are so constructed that each of them can be adjusted to occupy many different positions with relation to the moving parts of the punch press to which the guardis applied.

' This permits the guard member proper to be placed and operated at the most advantageous point of the punch press, resulting in a maximum efliciency in the protection of the operator of the press.

The guard is mounted to swing on the pivot stud 1. which is suitably threaded into the frame 2 of. thepress at a point well above the ram 3 and at one side thereof. The oscillating member f mounted to oscillate on the stud 1 forms the main supporting member for all of the parts of the guard including the guard member 5 proper. On top of the oscillating member and integral with it is formed 'a lug 6 having an oblong opening? extendingv from one side to the other side thereof. An arm 8 preferably made of flat cold rolled stock is adapted to pass through the opening? in the lug .6 and is rigidlyclamped in place therein by 1922. Serial No. 578,652.

means of the bolt 9. This is made possible because the top of the lug is slotted parallel with opening 7 so that when the upper ends of the lug are drawn together by means of the bolt 9, the sides of the opening 7 are forced against the sides of the arm Sand thus clamp them rigidly in place in the lug.

As illustrated in Figure 1, one part of the arm 8 extends to the right of the center of the oscillating member and the other part extends to the left thereof. The part of the arm that extends to the left is offset and extends also to the rear of the oscillating member for a purpose that will presently appear. To the end of the offset part of the arm 8 is pivoted to the connecting member 10.- This connecting member is adjustably held on the stem of the connecting link 11 being threaded thereon as illustrated in Figure 1. r The lower end of the connecting link 11 has an eye 12 formed thereon providing a bearing for the shank of the bolt 13 with which the lower end of the connect ing links is pivoted to the ram 3 of the press. l

The section of the arm projecting to, the right of the oscillating member 4 carries the adjustable block 14. This block is provided with an opening similar to the one provided in the lug 6 ofthe oscillating member 4 through which the arm 8 extends. The bolt 15 in the top of the block is adapted to clamp the block 14: to any point I along the arm by clamping the sides of the opening in the block against the sides of the arm as described in connection with the engagement of the arm into the opening In the lug 6.

Formed on the adjustable block 14 is a circular boss 16 having radial serrations 17 provided on the face thereof. These serrations are adaptedto be engaged by similar serrations 17 formed in the face ofthe bracket 18. A clamping bolt 19 passing through the bracket 18 and threaded into the center of the circular boss 16 is used to clamp the serrated face of the bracket 18 to the serrated face of the boss 16 tohold the bracket in the desired angular position with relation to the arm 8.

i The bracket 18 has a sleeveQO provided thereon through which the stem 21 forming part of the guard member 5 is adapted to pass. A. set screw 22 is threaded into the side of the sleeve in order to hold the guard member 5 in any desired elevation in front of the press.

The stem 21 of the guard member 5 has a section of the lower end thereof bent back on itself to form a parallel slot 2 between it and the stem proper. A resilient cushion 24: preferably made up of a strip of rubber or leather is inserted into this slot with the end of the guard wing 25 placed between it. Rivets and 27 are then passed through the bent up end of the stem 21,

. the cushion 24L, guard wing and stem 21 proper to fasten all of these parts to the stem to complete the guard member 5.

The arm 8 isoii'set and projects toward the rear of the oscillating member -11 in order to bring the connecting member 10 carried on this end of the arm in line with the face of the ram 3 of the press. This is desirable because iteliminatcs a bending of the connecting link which would be necessary if these parts were not located in the same vertical plane.

As will be seen from an inspection of Figure 1, the arm 8 can be adjusted on the oscillating member to increase or decrease the length of the section projecting from either the right or the left of the center of the oscillating member. In addition to this the block 14 carrying the'guari'l member can be adjusted along the arm toward or away from the oscillating member while the bracket 18 carried by the block 14 can be turned to hold the guard member 5 at any desired angular position with relation to the oscillating member and the arm 8. This range of adjustment of all of the parts of the guard makes it possible to set the guard in any conceivable and necessary position so that its operation will secure a maximum protection for the operator of the press.

In Figures 2 and 3 I have illustrated the oscillating member as being made up of several parts in order to secure still further adjustments for the guard. For this purpose the oscillating member is made up of a sleeve b0 having :1 depending lug 31 parallel to the axis of the sleeve fori'ned thereon. This lug has its two vertical faces or sides 32 and 33 serrated by a series of vertical serrations The lug 31 has a horizontal slot 35 extending from one side to the other side thereof and practically the full length thereof. This slot is provided to have the boltsBG and 37 extend therethrough and clamp the blocks 38 and 39 to each of the serrated sides 31 and 32 respectively.

Each ofthe blocks 38 and 39 is provided with a flange 40 having its inner side serrated to correspond with the serrations in the faces of the lug 31. The bolts 36'and 37 pass'through a suitable opening in each of these flanges and through the slot in the lug 81 and have a nut all with a lock washer e2 threaded on the outer end thereof with which the head of the bolt and in turn the flange 10 can be drawn against the serrated sides of the lug 31. The engagement of the serrations on the lug and the flanges serve to hold the blocks 38 and 39 at any desired point on the lug so that they can be moved closer or farthc' apart from each other or from either end of the sleeve 30 as may be desired or necessary in the application and adjustment of'the guard to the press.

The blocks 58 and 39 are the same as or similar to the block Li illustrated in Figure 1 so that the arms 43 and 1 1 can be adjustably clamped therein. The oscillating member when constructed in the manner illustrated in Figure 2 has therefore two arms carried thereon, one for the engagement with the connecting link 11 pivoted on the ram of the press, and the other forthe carrying of the block lat which supports the guard member 5. In separating the one arm 8 into these two arms 43 and 44 two further adjustments of the guard can be made, namely. the adjustment of the guard member toward or away from in front of the rain of the press and the adjustment of connecting member 10 to bring it in the same vertical plane that the face of the ram block is lo ated.

In addition to these adjustments. the blocks 38 and 39 may be made so that an angular adjustment of the arms and 4:4- is possible thereon with relation to the lug 3.1 to which they are fastened. Such ablock is illustrated in Figure3 and comprises the flange 40, the bracket 45 on which this flange is formed, the circular boss 46 also formed integral with thebracket 45, and the bracket or block 17. The bracket or block 47 and he face of the circular boss 46 are provided with radial ser ations similar to those illus trated and described in connection with the block 14 and bracket 18, and this allows an angular adjustment of the blocks?! on the bracket into any desired angular position in which it is clamped by means of the clamping bolt 48. Both or either one or the other of the blocks 38 or 39 may be made in this manner in order to secure the adjustment necessary in a particular press or for practical. work on the press.

;I claim:

1. In a-guard for punch presses. the combination of a stationary pivot stud adapted to be threaded into the frame of the press on one side of the ram ofthe press, an oscillating member mounted on said stud, an arm adjustably mounted to slide thru said oscillating member, said arm projecting from said oscillating member to either side of the vertical center line thereof, a guard member carried by the arm projecting from one side of said oscillating member and means connected to the arm projecting from the other inn side of said oscillating member to connect said arm to the movable member of the press.

2. In a guard for punch presses, the com bination of a pivot stud, an oscillating member mounted on said stud, an arm carried by said oscillating member, an adjustable block carried by said arm, a guard member mounted on said adjustable block, and means for connecting said. oscillating memher with the movable member of the press.

3. In a guard fol-punch presses, the combination'of a pivot stud, an oscillating member mounted on said stud, an arm adjustably mounted to slidethru said oscillating member at right angles to said stud, a. guard member carried by said arm, and means for connecting said oscillating member with the movable member 01 the press and means for lengthening or shortening said connecting means to increase or decrease the swinging of said arm on the oscillation of said oscillating member.

4:. In a guard for punch presses, the combination of a pivot member, an oscillating member mounted on said pivot member, an arm adjustably mounted on said oscillating member, a block carried by said arm, a bracket carried by said block, means for angularly adjusting said bracket on said block, a guard member carried by said bracket, and means to connect said oscillating member with. the movable member of the press.

5. In a guard for punch presses, the combination of a pivot stud, an oscillating member mounted on said pivot stud, an arm carried by said oscillating member, said arm being adjustable on said oscillating member at right angles to the axis of said pivot stud, a block adjustably mounted on said arm, a. bracket provided on said block, means to angularly adjust said bracket on said block, a guard member carried by said bracket, a connecting member mounted on said arm, a link connecting said connecting member with the movable member of the press. 7

(i. In a guard for punch presses, the combination 0']. a pivot stud, an oscillating member .n'iouutcd on d pivot stud, a guard arm carried by said oscillating member a guard carried bysaid guard arm, a link connecting said oscillating member with the for adjusting said arm in or out on said oscillating member and angularly thereto, a guard member carried by said arm and means for connecting said oscillating member with the moving member of the mess.

8. In a guard. for punch presses, the combination of a pivot stud, an. oscillating mcmber mounted on said pivot stud, an arm carried by said oscillating member, means for adjusting said arm in and out on said oscil lating member and angularly thereto, a guard arm mounted on said adjustable arm and means for connecting said oscillating member *ith the moving part of the press.

9. In a guard for punch presses, the combination of a pivot member, an oscillating member mounted on said pivot member, a split sleeve provided on: said oscillating .member, an arm adjustably clamped inplace in'said split sleeve, a split block adjustably clamped on said arm on one side of said oscillating member, a guard, arm carried by said split bloc: and means connecting said arm With the ram of the press.

10. In a guard for punch presses, the combination of a pivot member, an oscillating member mounted on said pivot member, a sleeve provided on said oscillating member, "an arm projecting thru said sleeve and being adjustably clamped in place in said sleeve to project from either side of said oscillating member, a link connected to the portion of said arm projecting from one side of said oscillating member, and a guard arm fastened to theportion of said arm projecting from the other side of said oscill atin g member.

In testimony whereof I atlix my signature.

I ERIC IsoHiNenr. 

